import json
from datetime import datetime
import time
from django import http
from django.core.paginator import Paginator
from django.shortcuts import render

# Create your views here.
from django.views import View

from goods.models import GoodsCategory, SKU, GoodVisitCount
from meiduo_mall.utils.login import MyloginRequiredMiXinView
from meiduo_mall.utils.my_category import get_category
from meiduo_mall.utils.my_crumb import get_crumbs
from meiduo_mall.utils.response_code import RET


class SkuListView(View):
    def get(self, request, category_id, page_num):



        categories = get_category()
        category = GoodsCategory.objects.get(id=category_id)

        # sort = request.get("sort", "default")
        sort = request.GET.get("sort", "default")

        if sort == "price":
            sort_field = "price"

        elif sort == "hot":
            sort_field = "-sales"

        else:
            sort = "default"
            sort_field = "create_time"

        #3,分页查询
        skus = SKU.objects.filter(category_id=category_id).order_by(sort_field)
        paginator = Paginator(object_list=skus,per_page=5) #创建分类对象,每页5条
        page = paginator.page(page_num)# 获取page_num页
        skus_list = page.object_list #获取page_num中的所有的对象
        current_page = page.number #当前页
        total_page = paginator.num_pages #总页数


        #拼接数据,返回响应
        context = {
            "categories": categories,
            "category": category,
            "skus_list": skus_list,
            "current_page": current_page,
            "total_page": total_page,
            "sort": sort
        }

        return render(request, "list.html", context=context)


class HotskuListView(View):
    def get(self, request, category_id):
        skus = SKU.objects.filter(category_id=category_id).order_by("-sales")[:2]

        hot_sku_list=[]
        for sku in skus:
            sku_dict = {
                "id": sku.id,
                "name": sku.name,
                "price": sku.price,
                "default_image_url": sku.default_image_url.url,
            }
            hot_sku_list.append(sku_dict)

        return http.JsonResponse({"hot_sku_list": hot_sku_list})


class SKUDetailView(View):
    def get(self, request, sku_id):
        categories = get_category()
        category = get_crumbs(sku_id)

        sku = SKU.objects.get(id=sku_id)

        # 4,商品sku规格信息
        # 构建当前商品的规格键
        sku_specs = sku.specs.order_by('spec_id')
        sku_key = []
        for spec in sku_specs:
            sku_key.append(spec.option.id)
        # 获取当前商品的所有SKU
        skus = sku.spu.sku_set.all()
        # 构建不同规格参数（选项）的sku字典
        spec_sku_map = {}
        for s in skus:
            # 获取sku的规格参数
            s_specs = s.specs.order_by('spec_id')
            # 用于形成规格参数-sku字典的键
            key = []
            for spec in s_specs:
                key.append(spec.option.id)
            # 向规格参数-sku字典添加记录
            spec_sku_map[tuple(key)] = s.id
        # 获取当前商品的规格信息
        goods_specs = sku.spu.specs.order_by('id')
        # 若当前sku的规格信息不完整，则不再继续
        if len(sku_key) < len(goods_specs):
            return
        for index, spec in enumerate(goods_specs):
            # 复制当前sku的规格键
            key = sku_key[:]
            # 该规格的选项
            spec_options = spec.options.all()
            for option in spec_options:
                # 在规格参数sku字典中查找符合当前规格的sku
                key[index] = option.id
                option.sku_id = spec_sku_map.get(tuple(key))
            spec.spec_options = spec_options


        context= {
            "categories": categories,
            "category": category,
            "sku": sku,
            "specs": goods_specs
        }


        return render(request, "detail.html", context=context)


class GoodsVisitView(View):
    def post(self, request, category_id):
        try:
            category = GoodsCategory.objects.get(category_id=category_id)
        except Exception as e:
            return http.HttpResponseForbidden("分类不存在")

        local_time = time.localtime()
        current_str = "%d-%02d-%02d" % (local_time.tm_year, local_time.tm_mon, local_time.tm_mday)
        current_date = datetime.strftime(current_str, "%Y-%m-%d")

        try:
            visit_count = category.visit_counts.get(date=current_date)
        except Exception as e:
            visit_count = GoodVisitCount()

        visit_count.category_id = category_id
        visit_count.date = current_date
        visit_count.count += 1

        visit_count.save()

        return http.JsonResponse({"code": RET.OK,"errmsg": "success"})



